Sorry about the psp getting bricked man. The pandora battery itself can be sold to other people trying to hack their psp. You can always sell the psp on ebay and see how much you can get.
^Depends on how much effort/time/money it will cost to fix it to normal working order. If it all outweighs the trouble then sell it as a broken console.
Thread title is kind of misleading. I help:
"Should I try to sell a bricked psp or sell it as spare parts?"
If you don't already have a Pandora battery then I wouldn't spend the money on one just to unbrick your PSP. Just try to sell it on eBay- broken consoles generally sell for decent prices there. Even a PSP in full working order isn't going to sell for a lot anymore, considering that the PSVita is out now.